Dear gate users,<br>I have 2 questions about material properties in GATE:<br>1- what means <span style="color: rgb(255, 0, 0);">registered couples</span> in GATE running page? and what is the difference between <span style="color: rgb(255, 0, 0);">registered couples <span style="color: rgb(0, 0, 0);">and</span> </span> <span style="color: rgb(255, 0, 0);">Nb of materials</span> that are differentially pointed out in GATE running page at each run?<br>
2- in voxelised phantom when i define only one material (eg:Water) in my voxel phantom in range.dat file, GATE shows <span style="color: rgb(51, 204, 0);">Water,Air,Vacuum</span> in it's running page (in <span style="color: rgb(255, 0, 0);">registered couples <span style="color: rgb(0, 0, 0);">and</span> </span> <span style="color: rgb(255, 0, 0);">Nb of materials<font color="#000000">)</font></span>. what is it's reason?<br>
<br>here is GATE output in running page: when only define Water as a material in voxel phantom.<br><b>...</b><br><br>Time set to (s) 0<br> GateMaterialDatabase: did not load properties table for material 'Vacuum'.<br>
This is only a problem when OPTICAL PHOTONS are transported in this material.'<br>GateVoxelBoxParameterizedInserter::ConstructGeometry - Warning ! ConstructGeometry called without a reader<br> GateMaterialDatabase: did not load properties table for material 'Water'.<br>
This is only a problem when OPTICAL PHOTONS are transported in this material.'<br><br><b>...</b><br><br>***** Table : Nb of materials = 3 *****<br><br> Material: Air density: 1.290 kg/m3 RadL: 283.896 m Imean: 85.628 eV temperature: 273.15 K pressure: 1.00 atm<br>
---> Element: Nitrogen (N) Z = 7.0 N = 14.0 A = 14.01 g/mole ElmMassFraction: 75.53 % ElmAbundance 78.44 %<br> ---> Element: Oxygen (O) Z = 8.0 N = 16.0 A = 16.00 g/mole ElmMassFraction: 23.18 % ElmAbundance 21.08 %<br>
---> Element: Argon (Ar) Z = 18.0 N = 40.0 A = 39.95 g/mole ElmMassFraction: 1.28 % ElmAbundance 0.47 %<br> ---> Element: Carbon (C) Z = 6.0 N = 12.0 A = 12.01 g/mole ElmMassFraction: 0.01 % ElmAbundance 0.02 %<br>
<br> Material: Vacuum density: 0.000 mg/cm3 RadL: 631723.294 km Imean: 21.800 eV temperature: 273.15 K pressure: 1.00 atm<br> ---> Element: Hydrogen (H) Z = 1.0 N = 1.0 A = 1.01 g/mole ElmMassFraction: 100.00 % ElmAbundance 100.00 %<br>
<br> Material: Water density: 1.000 g/cm3 RadL: 36.092 cm Imean: 70.893 eV <br> ---> Element: Hydrogen (H) Z = 1.0 N = 1.0 A = 1.01 g/mole ElmMassFraction: 11.21 % ElmAbundance 66.67 %<br>
---> Element: Oxygen (O) Z = 8.0 N = 16.0 A = 16.00 g/mole ElmMassFraction: 88.79 % ElmAbundance 33.33 %<br><br><b>...</b><br><br>========= Table of registered couples ==============================<br>
<br>Index : 0 used in the geometry : Yes recalculation needed : No <br> Material : Air<br> Range cuts : gamma 0.000e+00 fm e- 1.000e+00 cm e+ 1.000e+00 mm <br> Energy thresholds : gamma 9.900e+02 eV e- 1.686e+01 keV e+ 9.900e+02 eV <br>
Region(s) which use this couple : <br> DefaultRegionForTheWorld<br><br>Index : 1 used in the geometry : Yes recalculation needed : No <br> Material : Vacuum<br> Range cuts : gamma 0.000e+00 fm e- 1.000e+00 cm e+ 1.000e+00 mm <br>
Energy thresholds : gamma 9.900e+02 eV e- 9.900e+02 eV e+ 9.900e+02 eV <br> Region(s) which use this couple : <br> DefaultRegionForTheWorld<br><br>Index : 2 used in the geometry : Yes recalculation needed : No <br>
Material : Water<br> Range cuts : gamma 0.000e+00 fm e- 1.000e+00 cm e+ 1.000e+00 mm <br> Energy thresholds : gamma 9.900e+02 eV e- 2.147e+00 MeV e+ 3.387e+02 keV<br> Region(s) which use this couple : <br>
DefaultRegionForTheWorld<br><br><br><br>thanks in advance<br style="color: rgb(255, 0, 0);" clear="all"><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);">-- </span><br>Ali Asghar Parach,Ph.D. student in Medical Physics,Tarbiat Modares University,Tehran,Iran<br>